Why soda “calms down” when you close the cap after opening it once? Why it doesnt explode the next time you open the bottle?

Question

I mean no gases were leaked from the bottle while the cap is closed so why is it doing that.

In: Chemistry

Answer 1

The first time you open it, it has been shaken up on the way to get to you (for example in the truck on the way to the store from the factory), so some of the gas in the soda leaves the fluid and increases the pressure in the bottle. When you open the bottle, that pressure escapes. Now if you close it and don’t shake it up, the gas in the soda stays in the soda so the pressure doesn’t go up. Also, you already lost some of the gas the first time you opened it, so even if you shake it a second time, there will be less gas available in the soda to escape and cause the pressure to go up.